检索结果-内蒙古大学图书馆

IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems (MASS)

作者： Amitabha Ghosh Ozlem Durmaz Incel V.S. Anil Kumar Bhaskar Krishnamachari Ming Hsieh Department of Electrical Engineering University of Southern California Los Angeles CA USA NETLAB Department of Computer Engineering Bogazici University Istanbul Turkey Department of Computer Science and Virginia Bio-Informatics Institute Virginia Technology Blacksburg VA USA

ISBN: (纸本)9781424451142

Fast and periodic collection of aggregated data is of considerable interest for mission-critical and continuous monitoring applications in sensor networks. In the many-to-one communication paradigm known as convergecast, we consider scenarios where data packets are aggregated at each hop en route to a sink node along a tree-based routing topology and focus on maximizing the data collection rate at the sink by employing TDMA scheduling and multiple frequency channels. Our key result in the paper lies in proving that minimizing the schedule length for an arbitrary network in the presence of multiple frequencies is NP-hard, and in designing approximation algorithms with worst-case provable performance guarantees for geometric networks. In particular, we design a constant factor approximation for networks modeled as unit disk graphs (UDG) where every node has a uniform transmission range, and a O(Delta(T)log n) approximation for general disk graphs where nodes have different transmission ranges; n is the number of nodes in the network and Delta(T) is the maximum node degree on a given routing tree T. We also prove that a constant factor approximation is achievable on UDG even for unknown routing topologies so long as the maximum node degree in the tree is bounded by a constant. We also show that finding the minimum number of frequencies required to remove all the interfering links in an arbitrary network in NP-hard. We give an upper bound on the maximum number of such frequencies required and propose a polynomial time algorithm that minimizes the schedule length under this scenario. Finally, we evaluate our algorithms through simulations and show various trends in performance for different network parameters.

关键词： Scheduling algorithm Frequency Routing Network topology Mission critical systems Monitoring Time division multiple access Algorithm design and analysis Approximation algorithms Tree graphs

来源：评论

学校读者我要写书评

暂无评论

Assessment for Attending and Responding Stages of Affective Teaching Goal in Distance Learning Based on Fuzzy Fusion

Assessment for Attending and Responding Stages of Affective ...

引用

International Forum on Information technology and Applications, IFITA

作者： Kuo-An Hwang Chia-Hao Yang Chuan-Ren Wang Institute of Networking and Communication Engineering Chao Yang University of Technology Taichung Taiwan Institute of Informatics Chao Yang University of Technology Taichung Taiwan Department of Computer Science and Information Engineering Chao Yang University of Technology Taichung Taiwan

Distance learning is a learning style that can overcome the limitation of time and space. Because of the distance, teachers can not assess the achievement of affective domain teaching goal. If teachers can know the student's affective state through the learning system, they can overcome the difficult. The research applies the image recognition technologies to capture the face images of students and analyzes their participation in discussion to evaluate the student's affective state by fuzzy integral. Finally, teachers can assess the student's achievement in affective domain teaching goal.

关键词： Education computer aided instruction Distance learning Space technology Chaotic communication Information technology Application software computer applications Psychology Electronic learning

来源：评论

学校读者我要写书评

暂无评论

Improved Shape Context algorithm for online fast recognition -an application in pedestrian detection from a moving vehicle

Improved Shape Context algorithm for online fast recognition...

引用

IEEE Symposium on Intelligent Vehicle

作者： Min Wang Jian-Qing Wang Hong Qiao Xian-Bin Cao Institute of Automation Chinese Academy and Sciences Beijing China School of Computer Science University of Manchester Institute of Science and Technology Manchester UK School of Informatics University of Manchester Institute of Science and Technology Manchester UK Laboratory of Complex Systems and Intelligent Science Institute of Automation Chinese Academy and Sciences Beijing China Department of Computer Science and Technology University of Science and Technology Hefei China

ISBN: (纸本)9781424435036

Shape context algorithm is a recently proposed good method for object recognition. It is robust under small geometrical distortions and occlusion, invariant under scaling, translation, and change of illumination. However, because of its computational complexity, this algorithm is not suitable for online recognition. In this paper, we proposed an improved shape context algorithm which introduces an optimal hierarchical structure and gives new reference points selection criteria. Compared with the original shape context algorithm, the improved algorithm keeps the recognition accuracy and reduces the computational cost greatly. The good experimental results reveal that, this new algorithm can be applied to the pedestrian detection system online, which is an important research topic in intelligent transportation.

关键词： Shape Vehicle detection Vehicles Change detection algorithms Intelligent transportation systems Object recognition Robustness Lighting Computational complexity Computational efficiency

来源：评论

学校读者我要写书评

暂无评论

An exterior-point approach to the fixed-order mixed H∞/D-stability controller design

An exterior-point approach to the fixed-order mixed H∞/D-st...

引用

International Conference on Control and Automation (ICCA)

作者： Takeshi Terada Yasushi Kami Eitaku Nobuyama Department of the Mechanical and Electronic System Engineering Akashi National College of Technology Hyogo Japan Department of the Electrical and Computer Engineering Akashi National College of Technology Hyogo Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781424447060

This paper deals with the mixed H ∞ /D-stability control problem with a fixed-order output feedback controller. It is well known that this control problem is described as a combined bilinear matrix inequality (BMI) problem whose feasible solution is difficult to be found. In this paper, we propose a new exterior-point approach for finding a feasible solution of this problem. The advantage of our approach is to be able to use a non-stabilizing controller as an initial point. Numerical examples show the efficiency of our approach.

关键词： Output feedback Automatic control Linear matrix inequalities Iterative methods Educational institutions Design automation Robust control Uncertainty Time factors computer numerical control

来源：评论

学校读者我要写书评

暂无评论

DryadLINQ for Scientific Analyses

DryadLINQ for Scientific Analyses

引用

IEEE International Conference on e-Science and Grid Computing

作者： Jaliya Ekanayake Thilina Gunarathne Geoffrey Fox Atilla Soner Balkir Christophe Poulain Nelson Araujo Roger Barga School of Informatics and Computing Indiana University Bloomington USA School of Informatics and Computing Pervasive Technology Institute Indiana University Bloomington USA Department of Computer Science University of Chicago USA Microsoft Research Limited USA

Applying high level parallel runtimes to data/compute intensive applications is becoming increasingly common. The simplicity of the MapReduce programming model and the availability of open source MapReduce runtimes such as Hadoop, are attracting more users to the MapReduce programming model. Microsoft has released DryadLINQ for academic use, allowing users to experience a new programming model and a runtime that is capable of performing large scale data/compute intensive analyses. In this paper, we present our experience in applying DryadLINQ for a series of scientific data analysis applications, identify their mapping to the DryadLINQ programming model, and compare their performances with Hadoop implementations of the same applications.

关键词： Pipelines USA Councils Hardware Conference management Astronomy Resilience Fault tolerant systems Monitoring Physics computing Availability

来源：评论

学校读者我要写书评

暂无评论

A fuzzy cognitive map based tool for prediction of infectious diseases

A fuzzy cognitive map based tool for prediction of infectiou...

引用

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Elpiniki I. Papageorgiou Nikolaos I. Papandrianos Georgia Karagianni George C. Kyriazopoulos Dimitrios Sfyras Department of Informatics and Computer Technology Technological Educational Institute of Lamia Lamia Greece Department of Nuclear Medicine University of Patras Greece Department of Intensive Care Unit General Hospital of Lamia Lamia Greece

The prediction of pulmonary infections in intensive care unit is a complex medical task where a large number of parameters, tests, clinical symptoms and laboratory results are present. The knowledge of physicians according to the physical examination and clinical measurements are the main point to succeed a diagnosis and monitoring patient status. This paper presents the results of our investigation of the problem of representing knowledge for medical diagnosis systems concentrated on the pulmonary infections. The main topic of the presented effort is the representation of the cause-effect relationships within medical data by the application of the soft computing technique of fuzzy cognitive maps. The fuzzy cognitive map is a knowledge based technique for modeling and representing experts' knowledge. It can handle efficiently with complex modeling problems to assess medical decision making tasks. Due to its easy graphical representation the proposed FCM can be used to make the medical knowledge widely available through computer consultation systems.

关键词： Fuzzy cognitive maps Diseases Medical diagnostic imaging Decision making Artificial intelligence Medical diagnosis Lungs Decision support systems Fuzzy logic Uncertainty

来源：评论

学校读者我要写书评

暂无评论

Experimental Results and Evaluation of SmartBox Stimulation Device in a P2P E-learning System

Experimental Results and Evaluation of SmartBox Stimulation ...

引用

International Conference on Network-Based Information Systems (NBIS)

作者： Keita Matsuo Leonard Barolli Joan Arnedo-Moreno Fatos Xhafa Akio Koyama Arjan Durresi Graduate School of Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Computer Science Multimedia and Telecommunication Universitat Oberta de Catalunya Barcelona Spain Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain Department of Informatics Yamagata University Yonezawa Yamagata Japan Department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN USA

In this paper, we present the experimental results and evaluation of the SmartBox stimulation device in P2P e-learning system which is based on JXTA-Overlay. We also show the design and implementation of the SmartBox environment that is used for stimulating the learners motivation to increase the learning efficiency. The SmartBox is integrated with our P2P system as a useful tool for monitoring and controlling learners' activity. We found by experimental results that the SmartBox is an effective way to increase the learner's concentration. We also investigated the relation between learner's body movement, concentration, and amount of study. From the experimental results, we conclude that the use of SmartBox is an effective way to stimulate the learners in order to continue studying while maintaining the concentration.

关键词： Electronic learning Electronic mail Information security Peer to peer computing Control systems Internet Web server informatics Monitoring Application software

来源：评论

学校读者我要写书评

暂无评论

Foreword to the SMAP '09 special session on intelligence, adaptation and personalization on the web

SMAP '09 - 4th International Workshop on Semantic Media Adap...

引用

SMAP '09 - 4th International Workshop on Semantic Media Adaptation and Personalization 2009年 97-98页

作者： Louta, Malamati Michalas, Angelos Anagnostopoulos, Ioannis Department of Informatics and Telematics Harokopio University of Athens Athens 17671 Greece Department of Informatics and Computer Technology Technological Educational Institute of Western Macedonia Kastoria 52100 Greece Department of Information and Communication Systems Engineering University of the Aegean Karlovassi 83200 Samos Greece

来源：评论

学校读者我要写书评

暂无评论

Comparative evaluation of spatial context techniques for semantic image analysis

Comparative evaluation of spatial context techniques for sem...

引用

International Workshop on Image Analysis for Multimedia Interactive Services, WIAMIS

作者： G. Th. Papadopoulos C. Saathoff M. Grzegorzek V. Mezaris I. Kompatsiaris S. Staab M. G. Strintzis Centre of Research & Technology Hellas Informatics and Telematics Institute Thessaloniki Greece Information Processing Laboratory Electrical & Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Information Systems & Semantic Web Research Group Institute of Computer Science University of Koblenz Koblenz Germany

In this paper, two approaches to utilizing contextual information in semantic image analysis are presented and comparatively evaluated. Both approaches make use of spatial context in the form of fuzzy directional relations. The first one is based on a Genetic Algorithm (GA), which is employed in order to decide upon the optimal semantic image interpretation by treating semantic image analysis as a global optimization problem. On the other hand, the second method follows a Binary Integer Programming (BIP) technique for estimating the optimal solution. Both spatial context techniques are evaluated with several different combinations of classifiers and low-level features, in order to demonstrate the improvements attained using spatial context in a number of different image analysis schemes.

关键词： Image analysis Image segmentation Classification algorithms Information processing Image generation Image retrieval informatics Telematics Information systems Semantic Web

来源：评论

学校读者我要写书评

暂无评论

A fixed-order D-stability controller design with an output feedback using a modified exterior-point approach

A fixed-order D-stability controller design with an output f...

引用

Asian Control Conference

作者： Takeshi Terada Yasushi Kami Eitaku Nobuyama Department of the Mechanical and Electronic System Engineering Advanced Courses of Akashi National College of Technology Hyogo Japan Department of the Electrical and Computer Engineering Akashi National College of Technology Hyogo Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781424454402

This paper is concerned with a D-stability controller design problem with a static or a reduced-order output feedback controller. This problem is difficult to be solved theoretically, because it consists of some bilinear matrix inequality's (BMI's). In this paper, an exterior-point approach to this problem, which produces a controller sequence approaching a feasible region from an infeasible one is proposed. The feature of our approach is to be able to use a non-stabilizing controller as an initial point of the sequence. A numerical example shows the efficiency of our approach.

关键词： Output feedback Control systems Electric variables control Linear matrix inequalities Iterative methods Educational institutions Time factors Optimization methods State feedback Systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：